This document provides an overview of modern and postmodern architecture movements from the 20th century. It begins with early modern movements like the Chicago School in the 1880s and Art Nouveau in the 1890s. Important early modern styles that developed in the early 1900s are also outlined, including the Bauhaus school and International Style. Characteristics of modern architecture like simplicity, functionalism, and exposed structures are defined. The document then explores the development of postmodern architecture starting in the 1960s, noting its rejection of strict modernism in favor of eclecticism and playfulness. Several pioneering postmodern architects are profiled, including Michael Graves, known for colorful, classical designs, and Charles Moore, who incorporated historical influences.